using the pythagorean theorem
a^2+b^2 = c^2 where c is the hypotenuse
9^2 +12^2 = x^2
81 + 144 = x^2
225 = x^2
taking the square root of each side
sqrt(225) = x
15 =x
x = 15 inches
9W + W^2 + 20 using the foil method
Label the vertical axis to show the frequencies. For each interval, count the number of data values from the stem-and- leaf plot<span>. </span>Draw<span> a bar with a height of the number of data values in that interval. In the </span>stem-and-leaf plot<span> in Example 1, the </span>stems<span>represent the tens place of each data value. is this what you need
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Negative 1 because 3 x 3 is 9 and -2 x 5 is -10. Therefore 9-10= negative 1
